Phanogomphus graslinellus(Walsh, 1862)Pronghorn Clubtail

Status-Global/State:

Distinguishing Characteristics:

This strikingly marked, green and brown striped clubtail has a black abdomen marked with yellow. The length of the body varies from 1.8 to 2.1 inches. It is similar to some other clubtails so a careful inspection is needed. Clubtail species are very similar to each other in some aspects, careful inspection is needed to identify them.

Description of Habitat/Range:

It is mainly found throughout central United States and south central Canada. It is usually found at ponds, lakes and slow streams. Infrequently found in Wisconsin, it is only known from few northwestern and southern counties.

Flight Season:

Mid-June to early August in Wisconsin.

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

70%(32)

24%(11)

4%(2)

2%(1)

Shading illustrates monthly percentages of the total flight season records for the species.
Each flight season record is a unique date/location/observer combination where one or more adult or an
exuvia was recorded (excludes nymphs). The actual number of flight season records for each month is shown
in parentheses.

Flight seasons begin earlier in the southern
part of the state, often by a week or more. Also, flight charts may not be accurate for rare species because of
few data available.